Make sure that your username is easy to remember, write and share.
To make your profile stand out and memorable, upload a profile picture.
By participating on the website you make it more pleasurable to use the website for you and others.
People browse other profiles all the time and if they see a profile that they like they will subscribe. Also great content make users stay long on your page, thus, more money for you.
By using a unique font of your choice, or selecting a color that is unique to you, you make your memes stand out and people will notice your memes and subscribe.
By posting on a specific niche, like success kid for example, you let other users know what type of content you upload. This way if people like your memes they will subscribe.
Do you want more subscribers? You should advertise on PicturePunches. You can do that for just $0.01 per 1000 impressions.